Valve-grinding tool



E. L. BEARDSLEY.

VALVE GRINDING TOOL.

APPLICATION FILED MAR. 25. 1918. RENEWED JUNE 10, 1920.

1347,24 3. Patented July 20, 1920.

UNITED STATES EDSON I. BEARDSLEY, OF COLUMBUS,

PATENT OFFICE.

OHIO, ASSIGNOR TO THE LOOMIS BEARDSLEY vALvE GRINDING'r TOOL.

Application filed March 25, 1918, Serial No. 224,456. Renewed June To all whom it may concern:

Be it known that I, EDsoN L. BEARDSLEY, a citizen of the United States, residing at Columbus, in the county of Franklin and State of Ohio, have and useful Improvements in Valve-Grinding Tools, of which the following is a specification.

This invention relates to valve grinding tools, and has particular reference to the type employed for use in grinding and removing carbon or similar deposit from the valve seats ofinternalcoinbustion engines.

The object of the invention is to provide a tool of this. character with simple and improved mechanism for transmitting rotary and oscillatory movement to the valve rotating stem of the tool, in order that the degree of rotation of said stem may be conveniently governed, and its consequent grinding action rendered adjustable to conform with the amount of grinding necessary in smoothly and perfectly finishing a valve seat. I

A further object of the invention rests in improved means for effecting the rotation of a valve grinder stem, wherein the latter is provided with a fixed gear'element situated to en age with a longitudinally disposed reciprocatory rack member, whereby upon being manually reciprocated said member will impart rotary and oscillatory movement to said valve stem, the movement of the latter being in direct proportion to the stroke movement of said member.

Still further objects of the invention reside in a tool of this character of simple sub stantial and economical construction, capable of being dismantled when not in use in order to occupy but a min'nnum of storage space, and of such proportion that the various elements thereof may be manually operated with but a minimum of exertion and labor.

lVith these and other objects in view as will appear as the description proceeds, the invention accordingly consists in the novel features of construction, combination of elements and arrangement of parts hereinafter fully described and having the scope thereof defined by the appended claim.

In the accompanying drawing, forming a part of this SPBClfiCELtlOIli Figure 1 is a side elevation of the valve 7 Specification of Letters Patent.

invented certain new Patented July 20, 1920. 10, 1920. Serial No. 387,989.

grinding tool comprising the preferred form or the invention.

Fig. 2 is a horizontal sectional view taken along the line 22 of Fig. 1.

Fig. 3 is a transverse vertical sectional view, the plane of which being disclosed by the line 3-3 of Fig. l.

Similar characters of reference denote corresponding parts throughout the several views of the drawing.

eferring more particularly to Figs. 1 to 3 of the drawing, the preferred form of the invention consists of a rotatable valve stem 1, the latter having its lower end provided with a slot in which is removably positioned a valve engaging a rotating member 2. The latter is of usual construction, and is formed with the usual projections 3 disposed for engagement with openings, not shown, formed in the upper side of the valve, whereby the member 2 may be inserted into said openings so that upon the rotation of the stem the valve will be forced to revolve in unison therewith.

In this instance the stem is of rod formation, and the upper end thereof is provided with a point bearing 4, which bearing being situated within a similar bearing formed in a handle member 5. This member consists of a knobbed portion 6 from which depends a fixed tubular sleeve 7, the latter being disposed to surround and brace the upper end of the stem 1. Through the provision of the point bearing 4 it will be obvious that the stem 1 will be capable of revolving with the minimum amount of friction within the member 5, so that the manual rotation of said stem may be effected with ease and facility. In operation the knobbcd portion 6 is gripped by the hand, so that the valve stem 1 will be maintained in operative engagement with the cooperating valve, this permits the sleeve 7 to remain substantially stationary and through the provision of the bearing l the stem 1 may be freely rotated irrespective of what manual pressure that may be placed upon the knobbed portion 6 in retaining the stem 1 in engagement with a valve.

Coming now to the essential feature of the invention, the sleeve 7 is provided with a casing 8 situated on a substantially horizontal plane with respect to the vertical axis of the stem 1, and in this casing there is rotatably mounted a rigidly fastened, in this instance, to the stem 1. The casing is provided with a forwardly disposed open sided'portion 10, in which is mounted a curved guide member 11, which guide member is shaped and proportioned to receive a reciprocatory longibar 12. This bar is prothat when he bar is inserted in the guide member 11 the same will be firmly maintained in such position as to be only capable of longitudinal reciprocation. Any desired means may be provided for securing the guide member 11 within the front portion 10 of the casing 8, and in the present instance rivets 18 are provided for efiecting this result.

hen the bar 12 occupies its operative position within the guide member 11 the same will be so located thatthe gear element 9' will extend into the centrally disposed groove formed therein, and the teeth of said gear element will be situated so as to mesh with the apertures 1a formed in said bar, whereby upon the reciprocation of the latter synchronous movement will be imparted to gear element 9 which is ments' the former the valve stem. Thus it will be noted that the rotating or oscillatory movement of the stem 1 will be in direct proportion to the reciprocating stroke movement of theba'r 12 so that the stem l will be capable of being rotated to such degrees as desired by the tool operator. This selection for rotary governing control of the stem 1 is highly desirable, as it enables the operator to grind a valve roughly by loading stroke movements or to grind the valve finely and smoothlyby relatively short stroke movebeing preferably used when .a valve seat is being initially ground and the latter strokeemployed for finishing and perfectly smoothing'said valve seat.

Having thus described the invention what is claimed vas being new and patentable is:

A valve grinder comprising a rotatable stem, a gear fixed to said stem adjacent to the upper end of the latter, a casing carried by said stem and capable of being maintained in stationary position during the rotation of the stem, a guide member carriedby said casing and including curved finger elements, a reciprocatory actuating device disposed within said uide member, said device being formed lrom stamped sheet metal and having vertically disposed ribs, ceived and guided by said "fingers, and said actuating device being provided with a series of apertures disposed to mesh with said gear, whereby upon the operation of said device said gear and stem wil lbe oscillated.

In testimony whereof I a'iiix my signature.

Enson L. BEARDSLEY.

the latter being situated so as to' be re-; 

